Device and method for detecting surface magnetic field intensity of permanent magnet

Abstract

The invention provides a device and a method for detecting the surface magnetic field intensity of a permanent magnet. The device comprises a C-shaped soft magnetic material part, a conveying track and a Hall probe, wherein the permanent magnet is conveyed to an opening of the C-shaped soft magnetic material part through the conveying track; and the Hall probe is arranged in an air gap which is formed between the detected permanent magnet and the C-shaped soft magnetic material part. The method comprises the following steps of: placing the permanent magnet at the opening of the C-shaped soft magnetic material part to form the air gap between the permanent magnet and the C-shaped soft magnetic material part; and forming a uniform magnetic field in the air gap, and measuring the intensity of the magnetic field by using the Hall probe. By adoption of the device and the method, the surface magnetic field intensity of the permanent magnet can be conveniently and quickly measured, and measurement data is approximate to the actual operating state of the permanent magnet. The invention has the advantages of convenience for measurement, high efficiency and high accuracy, and can be applied to detection of the magnetic induction intensity of batched products.

Description

technical field [0001] The invention relates to a method for measuring magnetic field strength, in particular to a detection method for detecting the magnetic field strength on the surface of a permanent magnet. Background technique [0002] Permanent magnets are widely used in permanent magnetic field devices and equipment such as motors, instruments, electronic components, etc. middle. The working method of the permanent magnet is mainly to use the magnetic field strength generated by the permanent magnet itself. How to measure the magnetic field strength of the permanent magnet is the key to the inspection and judgment of the permanent magnet before assembly. A fast, accurate and close-to-use magnetic field strength measurement method is needed. [0003] For a single permanent magnet, its surface magnetic field intensity varies with different positions in space. Generally, the magnetic field intensity at the center of the polar surface of the permanent magnet is lower th...

AI Technical Summary

Problems solved by technology

[0006] Specifically, the magnetic field strength measurement method in the prior art has the following disadvantages: the conventional method measures the surface magnetic field strength of a single permanent magnet, but in actual application, the permanent magnet should be in contact with other devices to form a working magnetic circuit. The magnetic field strength of the working magnetic circuit is different from that of a single permanent magnet, that is to say, measuring the surface magnetic field strength of a single permanent magnet cannot reflect the surface magnetic field strength of the permanent magnet when it is working.

The Gauss meter plus Hall probe measurement method in the prior art is limited by the thickness of the hall element and the level of the measurement personnel

Images